vue.js - vue add i18n 在使用 vuejs3 和 @vue/cli 4.5.4 时遇到错误，该错误是什么意思以及如何调试？

Question

当我尝试 vue add i18n 时，我遇到了这个错误:

    🚀  Invoking generator for vue-cli-plugin-i18n...
 ERROR  Error: You cannot call "get" on a collection with no paths. Instead, check the "length" property first to verify at least 1 path exists.
Error: You cannot call "get" on a collection with no paths. Instead, check the "length" property first to verify at least 1 path exists.
    at Collection.get (/usr/local/lib/node_modules/@vue/cli/node_modules/jscodeshift/src/Collection.js:213:13)
    at injectOptions (/usr/local/lib/node_modules/@vue/cli/lib/util/codemods/injectOptions.js:15:6)
    at runTransformation (/usr/local/lib/node_modules/@vue/cli/node_modules/vue-codemod/dist/src/run-transformation.js:61:17)
    at Object.keys.forEach.file (/usr/local/lib/node_modules/@vue/cli/lib/Generator.js:290:23)
    at Array.forEach (<anonymous>)
    at Generator.resolveFiles (/usr/local/lib/node_modules/@vue/cli/lib/Generator.js:276:24)
    at process._tickCallback (internal/process/next_tick.js:68:7)

vue add 命令之前的 package.json 如下所示:

{
  "name": "com.food-cheatsheet",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint"
  },
  "dependencies": {
    "core-js": "^3.6.5",
    "vue": "^3.0.0-0",
    "vue-router": "^4.0.0-0"
  },
  "devDependencies": {
    "@vue/cli-plugin-babel": "~4.5.0",
    "@vue/cli-plugin-eslint": "~4.5.0",
    "@vue/cli-plugin-router": "~4.5.0",
    "@vue/cli-service": "~4.5.0",
    "@vue/compiler-sfc": "^3.0.0-0",
    "babel-eslint": "^10.1.0",
    "eslint": "^6.7.2",
    "eslint-plugin-vue": "^7.0.0-0",
    "tailwindcss": "^1.7.5"
  }
}

我使用 vue create 设置项目到目前为止安装了tailwindcss和postcss。
你能描述一下，这个错误的真正含义是什么？我猜它与 i18n 无关，但在我使用 add 时也会出现在其他模块中

npm install vue-i18n作品(仅供引用)

附加问题
如何在 vuejs 3.0 中设置 i18n？ vuejs2 和 3 的区别在哪里？

Answer 1

vuetifyjs 的相同问题 https://github.com/vuetifyjs/vue-cli-plugins/issues/140
对于 Vue 3

npm install --save vue-i18n@next
yarn add vue-i18n@next

并手动配置 i18n
来自 vue-i18n-next 的示例:
Example with using Composable API
Example with using Legacy API
Examples Directory
如果你想安装 vue add i18n改变

createApp(App)
  .use(store)
  .use(router)
  .mount("#app");

到

  new Vue({
    router,
    store,
    render: h => h(App)
  }).$mount("#app");

对于 typescript 项目添加 vue-i18n.d.ts 文件，内容为

declare module "vue-i18n"

对于 vue 3 我安装 npm install --save vue-i18n@next而不是 vue add i18n